Look at it this way. Four guys split into two teams and play paper scissors rock. They all throw scissors every damn time, and the game is a draw. One guy says, hey, throw rock. He says fuck no, I'll go paper. The other team throws scissors. Paper gets shredded and then the two scissors beat the shit out of the rock together.
If you listened to the suggestion, you'd be drasticly increasing your chances to win. But since you don't listen to the suggestion, you practically assure your own defeat. He has as much a right to call you stupid for that as you have to call his strategy a "circlejerk".
Is nobody obliged to follow a self-appointed leader? Well, considering that through following that leader you improve your chance of the entire team winning, you could say you are obliged to the team.
And is it not your fault if the team loses because you do not fulfill your obligations to the team?
Consider if a player went and hid in the bushes all round and never fought at all. Is he just as free to do that as you are to charge into the melee? Sure. But he fails his obligation to the team by not fighting. He's a leecher, and we kick leechers because they weaken the team. And he's at partially at fault if the team loses as well, since he did nothing to contribute towards victory.
If, by disobeying the group to fulfill your own right to do whatever you want reduces your group's success rate, you're at fault.
So your fine capital letters are squandered and I'll see you on the field.